MacViews: Implement Tab Dragging

ui/views/cocoa/bridged_content_view.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_COCOA_BRIDGED_CONTENT_VIEW_H_
 #define UI_VIEWS_COCOA_BRIDGED_CONTENT_VIEW_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/strings/string16.h"
 #import "ui/base/cocoa/tool_tip_base_view.h"
 #import "ui/base/cocoa/tracking_area.h"
 
 namespace ui {
 class TextInputClient;
 }
 
 namespace views {
 class View;
+
+// User data supplied in kCGEventSourceUserData for an event that should be
+// ignored.
+enum { kIgnoreEventUserData = 1 };
+
 }
 
 // The NSView that sits as the root contentView of the NSWindow, whilst it has
 // a views::RootView present. Bridges requests from Cocoa to the hosted
 // views::View.
 @interface BridgedContentView
     : ToolTipBaseView<NSTextInputClient, NSUserInterfaceValidations> {
  @private
   // Weak. The hosted RootView, owned by hostedView_->GetWidget().
   views::View* hostedView_;
@@ skipping 24 matching lines @@
 
 @property(readonly, nonatomic) views::View* hostedView;
 @property(assign, nonatomic) ui::TextInputClient* textInputClient;
 @property(assign, nonatomic) BOOL drawMenuBackgroundForBlur;
 
 // Extends an atomic, readonly property on NSView to make it assignable.
 // This usually returns YES if the view is transparent. We want to control it
 // so that BridgedNativeWidget can dynamically enable dragging of the window.
 @property(assign) BOOL mouseDownCanMoveWindow;
 
+// When |flag| is YES, will make BridgedContentView ignore all mouse events.
++ (void)setIgnoreMouseEvents:(BOOL)flag;
+
 // Initialize the NSView -> views::View bridge. |viewToHost| must be non-NULL.
 - (id)initWithView:(views::View*)viewToHost;
 
 // Clear the hosted view. For example, if it is about to be destroyed.
 - (void)clearView;
 
 // Process a mouse event captured while the widget had global mouse capture.
 - (void)processCapturedMouseEvent:(NSEvent*)theEvent;
 
 // Mac's version of views::corewm::TooltipController::UpdateIfRequired().
 // Updates the tooltip on the ToolTipBaseView if the text needs to change.
 // |locationInContent| is the position from the top left of the window's
 // contentRect (also this NSView's frame), as given by a ui::LocatedEvent.
 - (void)updateTooltipIfRequiredAt:(const gfx::Point&)locationInContent;
 
 // Update windowMask_ depending on the current view bounds.
 - (void)updateWindowMask;
 
 @end
 
 #endif  // UI_VIEWS_COCOA_BRIDGED_CONTENT_VIEW_H_